Shuzzles · ShudokuFriday, 4 September 2026
DiabolicalSwordfish, XYZ- and W-Wings, unique rectangles. Still pure logic — but only just.
28 clues · difficulty rating 430 · 58 logical stepsTechniques: Pointing Pair/Triple ×4, Y-Wing, BUG+1Pinch points: 10 (moments with only one move available) · average choices per step 4.8
shuzzles.co.uk/shudoku/2026-09-04/diabolical/